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The Chief Forecaster added: "A band of rain with some snow (this mostly on hills) will reach western Scotland and Wales on Tuesday afternoon and move quickly eastwards across all parts through the evening and overnight.

"Whilst a brief spell of snow is likely, mostly on high ground in the north of the yellow area, the main hazard is likely to be icy surfaces where rain falls onto frozen ground.

"This risk is greatest across parts of Scotland and northern England where the impacts could locally be greater than elsewhere.

"Temperatures may then rise a little for a time overnight before falling again by Wednesday morning as cloud clears, so ice remains likely. In addition, some wintry showers may affect western Scotland on Wednesday morning."